Imperceptibility and robustness study in different transform domain for copyright protection in digital image watermarking in hybrid SVD-domain

Copyright protection of digital images through watermarking technique is one of the viable approaches for industrial and commercial applications. Sustaining a watermark’s robustness during attack and preserving the image visual quality with watermark capacity is most challenging. In this work, we show the impact of attacks on the image imperceptibility and watermark robustness for a watermarking technique in hybrid transform domain with various wavelets. We observed that (i) the excellent multi-resolution features of wavelet coefficients help to enhance imperceptibility; (ii) the stability property of SVD ensures adequate robustness; (iii) Shuffling the keys have addressed the rising of FPP occurring in the conventional SVD based systems. The performance of the technique has been enumerated through various signal processing attacks. Performance examining has been done in terms of state-of-the-art measures like PSNR, NCC, SSIM, NSR. A subjective investigation of the experimental results validates the performance of the proposed technique in each transform domain.